28 Result(s)
within
C A Ross
Materials Science
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Article
Functional nanostructured materials based on self-assembly of block copolymers
Block copolymers (BCPs) microphase-separate to form periodic patterns with periods of a few nanometers and above without the need for lithographic guidance. These self-assembled nanostructures have a variety o...
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Article
Complex self-assembled patterns using sparse commensurate templates with locally varying motifs
Templated self-assembly of block copolymer thin films can generate periodic arrays of microdomains within a sparse template, or complex patterns using 1:1 templates1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16. However,...
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Article
Thermal Annealing Influence on Magnetic and Structural Properties of Cu56Ga28Mn16 Microwires
We report on the crystalline structure, morphology and thermomagnetic properties of glass-coated magnetic microwires with Cu56Ga28Mn16 composition, as well as the thermal annealing influence on its magneto-struct...
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Article
Magnetocaloric properties of rapidly solidified Ni51.1Mn31.2In17.7 Heusler alloy ribbons
Magnetic entropy change and refrigerant capacity have been determined for a field change of 20 kOe around the second-order magnetic transition of austenite in as-quenched Ni{in51.1}Mn{in31.2}In{in17.7} alloy r...
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Article
Patterned Magnetic Media Made by Self-Assembled Block-Copolymer Lithography
Patterned magnetic recording media, in which data bits are stored in discrete single-domain magnetic particles, have been proposed for the next generation of recording media. To achieve high densities, feature...
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Article
Large Magnetoresistance Variation of Pseudo Spin Valves with Different Nano Oxide Layer Position
We have investigated the influence of the nano-oxide layer positions on giant magnetoresistance(GMR) of the NiFe(9nm)/Cu(4nm)/Co(5nm) pseudo spin valves. Nano-oxide layer positions had a several effects on the...
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A method for making substrate-independent hardness measurements of soft metallic films on hard substrates by nanoindentation
A new method for making substrate-independent hardness measurements by nanoindentation techniques that applies to soft metallic films on very hard substrates is presented. The primary issue to be addressed is ...
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Article
Micromagnetics Simulation of Asymmetricpseudo-Spin Valve Dots
Wepresent simulation results for Ni79Fe21 (5 nm)/Cu (3 nm)/Co (4nm)pseudo-spin valves. These simulations have been conducted on several different aspect ratios of rectangular dots. Distinct switches of the two ma...
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Article
Soft X-Rays for Deep Sub-100 Nm Lithography, with and Without Masks
The development of micro- and nanofabrication, their applications, and their dependent industries has progressed to a point where a bifurcation of technology development will likely occur. On the one hand, the...
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Article
A Method for Laser Zone Texturing of Glass Based Magnetic Media Using Nd:Yag Lasers
Laser zone texturing of nickel-plated, aluminum based magnetic media has become a preferred method of providing a precisely controlled head landing zone. The Nd:YAG lasers used for this process are not suitabl...
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Article
In-Plane Anisotropy In CoCr(Ta, Pt)/Cr Films Deposited onto Substrates with Controlled Topography
In-plane magnetic anisotropy can be induced in Cr-underlayer/Co-alloy thin films by grooves or scratches in the substrate. To quantify this effect, silica substrates have been prepared with large areas of subm...
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Article
Nanoindentation Hardness of Soft Films on Hard Substrates: Effects of the Substrate
The ability to accurately measure the mechanical properties of thin metallic films is important in the semiconductor industry as it relates to device reliability issues. One popular technique for measuring thi...
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Article
Scanning Stiffness Microscopy - A Novel Technique for Detecting Sub-Surface Cracks
Thin film delamination and sub-surface cracking represent important reliability issues for the semiconductor and thin film magnetic hard disk industries. Detecting such defects is often difficult and requires ...
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Article
Microstructural Development Of thin CoCrTa Films on Cr Underlayers
The structure of 2.8 - 60nm thick films of CoCrTa sputtered onto a 50nm Cr underlayer at 250°C was studied using atomic resolution microscopy. The Cr grows with a (200) orientation and the CoCrTa grows epitaxi...
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Article
Effects of Adhesion on the Measurement of Thin Film Mechanical Properties by Nanoindentation
Experiments have been performed on soft aluminum films deposited on hard ceramic substrates to explore the influences of interfacial adhesion on mechanical property measurement by nanoindentation. The substrat...
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Article
Observation of Micromagnetic Structure in Computer Hard Disks by Lorentz Transmission Electron Microscopy
We have observed micromagnetic structure in real computer hard disks with the typical structure of C/Co alloy/Cr/NiP/Al(substrate) using Lorentz transmission electron microscopy (LTEM). A chemical etching meth...
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Mechanical Properties of Alumina Films Sputtered Over Steps
The properties of sputtered films are strongly affected by the topography of the underlying substrate, due to the dependence of film growth and resputtering yield on the angle of incidence of the sputtered mat...
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Article
Stress, Microstructure and Magnetic Properties of Thin Sputtered Co Alloy Films
The internal stress and magnetic properties have been measured for cobalt alloy films deposited using a range of sputter conditions. The sputter conditions affect the internal stress and the microstructure, bo...
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Article
The Effect of Microstructure on the Magnetic Properties of Thin Film Magnetic Media
Magnetic recording media used today are based on sputtered cobalt alloy films with thicknesses in the order of 50 nm. As recording density is increased, the microstructure of the film must be controlled with i...
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Article
Mechanical Stress Measurements in Window-Plated Permalloy Thin Film Strips
Mechanical stress measurements in long window-plated strips of permalloy have been made and show an anisotropy in the in-plane stresses. The stress parallel to the strip length is independent of the strip widt...
